Bionomics and ecology of Bemisia tabaci (Sternorrhyncha: Aleyrodidae) in Italy

Title:

Bionomics and ecology of Bemisia tabaci (Sternorrhyncha: Aleyrodidae) in Italy

Creator:

Bosco, Domenico and Caciagli, Piero

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:3d15c822-4320-4497-ab6d-4010c8cc2a6e
uuid:3d15c822-4320-4497-ab6d-4010c8cc2a6e

Subject:

Aleyrodidae, Bemisia tabaci, developmental time, cold resistance, overwintering, Italy, and distribution

Type:

article, model:article, and TEXT

Description:

The development of a B-biotype Bemisia tabaci Italian colony was studied on bean at 9 constant temperatures (15, 16, 17, 20, 23, 26, 29, 32, 35°C). The developmental time from egg-to-adult varied from 70 days at 16°C to 22 at 26°C and higher temperatures. A thermal requirement for egg-to-adult development of 307 day-degrees was calculated, based on a lower developmental threshold of 11.53°C. The survival of egg, nymph and adult whiteflies was investigated at 0, 2, 4, and 6°C on broad bean for periods of 1-8 days. The adult was the most cold-sensitive stage, while the egg and nymph showed a similar level of cold resistance. The effect of sub-lethal cold stress of 4-8 days at 4°C on eggs and nymphs was studied. After exposure to low temperatures, whiteflies needed longer developmental times, from 5 to 8 days more. The presence of B. tabaci under outdoor conditions in Italy was investigated with field surveys and correlated with climatic data; the whitefly species was found in open field conditions only south of the 41° parallel, in areas characterised by less than 5 frost days per winter and by annual mean temperatures >16°C.

Language:

English

Rights:

http://creativecommons.org/publicdomain/mark/1.0/
policy:public

Source:

European Journal of Entomology | 1998 Volume:95 | Number:4

Harvested from:

CDK

Metadata only:

false